The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 1979
Filed:
Dec. 21, 1977
Applicant:
Inventor:
Gerhard Kienel, Hanau, DE;
Assignee:
Leybold-Heraeus GmbH & Co. KG, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
428213 ; 350164 ; 3501 / ; 351166 ; 427164 ; 4272 / ; 428412 ; 428432 ;
Abstract
An optical body and a method of producing oxidic, antireflective coatings on transparent plastic substrates of polydiethyleneglycoldiallylcarbonate comprising depositing a first coating having a high refractive index by vaporizing an oxide mixture of essentially zirconium dioxide with a content of 4 to 15 weight percent of aluminum trioxide and depositing a second layer having a low refractive index by vaporizing in a vacuum a borosilicate glass containing less than 5 weight-percent of alkali metal oxides. The depositing of at least the first coating is performed in an oxidizing residual gas atmosphere.